Question

Species A shares 95% of its DNA with Species B. Species B shares 95% of its DNA with Species C. Which of the following statements can NOT be proven from this evidence? Mark ALL that apply.

Species A and Species C share 95% of their DNA.

Species A and Species C are more closely related to each other than Species B is related to either A or C.

Species A and Species C may be related, but they may not share 95% of their DNA. Species B is as closely related to Species A as it is to Species C.​

Answer 1

Answer: A,C share 95%, degree of relationship between A,C can’t be determined.

Explanation: without considering whether or not the difference is in coding DNA, no specific relationship between A and C can be determined. The 5% unshared between A and B could be shared by B and C and so on.